Patents by Inventor Eun Pa CHO

Eun Pa CHO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10655687
    Abstract: This invention relates to a paper friction material and a method of manufacturing the same, wherein the paper friction material is configured such that dispersibility and bondability are increased between a filler and a matrix. The paper friction material which is suitable for use in a vehicle, includes a friction base including pulp and a coating layer formed on the friction base using a mixture of latex and a functional material. The OH reactive group of the pulp and the aromatic ring of the latex are hydrogen-bonded so that the friction base and the coating layer are coupled with each other.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: May 19, 2020
    Assignees: Hyundai Motor Company, Jinmyung Frictech Co., Ltd., Kia Motors Corporation
    Inventors: Yoon Cheol Kim, Jai Min Han, Min Gyun Chung, Jae Young Lee, Byung Chan Lee, Yoon Joo Rhee, Sung Jin Hong, Eun Pa Cho, Chi Deuk Ahn
  • Publication number: 20190085909
    Abstract: This invention relates to a paper friction material and a method of manufacturing the same, wherein the paper friction material is configured such that dispersibility and bondability are increased between a filler and a matrix. The paper friction material which is suitable for use in a vehicle, includes a friction base including pulp and a coating layer formed on the friction base using a mixture of latex and a functional material. The OH reactive group of the pulp and the aromatic ring of the latex are hydrogen-bonded so that the friction base and the coating layer are coupled with each other.
    Type: Application
    Filed: November 15, 2018
    Publication date: March 21, 2019
    Applicants: Hyundai Motor Company, Jinmyung Frictech Co., Ltd., Kia Motors Corporation
    Inventors: Yoon Cheol Kim, Jai Min Han, Min Gyun Chung, Jae Young Lee, Byung Chan Lee, Yoon Joo Rhee, Sung Jin Hong, Eun Pa Cho, Chi Deuk Ahn
  • Patent number: 10161461
    Abstract: This invention relates to a paper friction material and a method of manufacturing the same, wherein the paper friction material is configured such that dispersibility and bondability are increased between a filler and a matrix. The paper friction material which is suitable for use in a vehicle, includes a friction base including pulp and a coating layer formed on the friction base using a mixture of latex and a functional material. The OH reactive group of the pulp and the aromatic ring of the latex are hydrogen-bonded so that the friction base and the coating layer are coupled with each other.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: December 25, 2018
    Assignees: Hyundai Motor Company, JINMYUNG FRICTECH CO., LTD.
    Inventors: Yoon Cheol Kim, Jai Min Han, Min Gyun Chung, Jae Young Lee, Byung Chan Lee, Yoon Joo Rhee, Sung Jin Hong, Eun Pa Cho, Chi Deuk Ahn
  • Patent number: 9995003
    Abstract: Disclosed herein is a wet paper friction material for vehicles. The wet paper friction material comprises: a matrix containing a hardwood pulp in an amount of about 40 to 50% by weight; a spherical silica in an amount of about 16 to 21% by weight; a friction modifier in an amount of about 5% by weight or less but greater than 0% by weight; and a filler constituting the remaining balance of the wet paper friction material, and all the % by weights are based on the total weight of the wet paper friction material.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: June 12, 2018
    Assignees: Hyundai Motor Company, Jinmyung Frictech Co., Ltd.
    Inventors: Yoon Cheol Kim, Seong Jin Kim, Eun Pa Cho, Young Taek Oh, Sung Jin Hong
  • Publication number: 20180058512
    Abstract: This invention relates to a paper friction material and a method of manufacturing the same, wherein the paper friction material is configured such that dispersibility and bondability are increased between a filler and a matrix. The paper friction material which is suitable for use in a vehicle, includes a friction base including pulp and a coating layer formed on the friction base using a mixture of latex and a functional material. The OH reactive group of the pulp and the aromatic ring of the latex are hydrogen-bonded so that the friction base and the coating layer are coupled with each other.
    Type: Application
    Filed: November 30, 2016
    Publication date: March 1, 2018
    Applicants: Hyundai Motor Company, JINMYUNG FRICTECH CO., LTD.
    Inventors: Yoon Cheol KIM, Jai Min HAN, Min Gyun CHUNG, Jae Young LEE, Byung Chan LEE, Yoon Joo RHEE, Sung Jin HONG, Eun Pa CHO, Chi Deuk AHN
  • Publication number: 20170159240
    Abstract: Disclosed herein is a wet paper friction material for vehicles. The wet paper friction material comprises: a matrix containing a hardwood pulp in an amount of about 40 to 50% by weight; a spherical silica in an amount of about 16 to 21% by weight; a friction modifier in an amount of about 5% by weight or less but greater than 0% by weight; and a filler constituting the remaining balance of the wet paper friction material, and all the % by weights are based on the total weight of the wet paper friction material.
    Type: Application
    Filed: August 2, 2016
    Publication date: June 8, 2017
    Inventors: Yoon Cheol Kim, Seong Jin Kim, Eun Pa Cho, Young Taek Oh, Sung Jin Hong
  • Patent number: 9499759
    Abstract: A multilayer paper-based wet friction material of an automotive auto transmission may improve noise and vibration characteristics, heat resistance, wear resistance, compression resistance, and oil absorbency. The paper-based wet friction material of an automotive auto transmission includes: a first layer using cellulose pulp as a matrix and including a first functional additive; a second layer stacked on the first layer, using the cellulose pulp as the matrix, and including the second functional additive; and a hydrogen bonding layer mediating between the first layer and the second layer. The cellulose pulp of the first and second layers is cotton linter.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: November 22, 2016
    Assignees: Hyundai Motor Company, Jinmyung Frictech Co., Ltd.
    Inventors: Yoon Cheol Kim, Eun Pa Cho, Young Taek Oh, Sung Jin Hong
  • Publication number: 20160160146
    Abstract: A multilayer paper-based wet friction material of an automotive auto transmission may improve noise and vibration characteristics, heat resistance, wear resistance, compression resistance, and oil absorbency. The paper-based wet friction material of an automotive auto transmission includes: a first layer using cellulose pulp as a matrix and including a first functional additive; a second layer stacked on the first layer, using the cellulose pulp as the matrix, and including the second functional additive; and a hydrogen bonding layer mediating between the first layer and the second layer. The cellulose pulp of the first and second layers is cotton linter.
    Type: Application
    Filed: March 30, 2015
    Publication date: June 9, 2016
    Inventors: Yoon Cheol KIM, Eun Pa CHO, Young Taek OH, Sung Jin HONG